An anomaly in the thermoelectric power, which is analogous to that observed below about 60 K in La2-xBaxCuO4 with x ∼ 1/8, has been observed below about 60 K also in the Zn-substituted La2-xSrxCu1-yZnyO4 with x ∼ 0.115 and y = 0.01 - 0.02. According to conclusions by Tranquada et al. [Nature, 375 (1995) 561], this is explained as being due to the formation of the static order of the stripe pattern of holes and spins on account of the pinning by Zn. Moreover, the long-standing problem on the conspicuous suppression of superconductivity in the Zn-substituted La2-xSrxCu1-yZnyO4 with x ∼ 0.115 is likely to be attributed to the static order of the stripe pattern owing to the pinning by Zn.
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